Pump



' L. L. GREEN l Feb. 15, 1944.

PUMP

Filed May 22, 1941 2 sheets-sheet 1 am o n T .N l m @.W UWM V l l1 m m ime/ Greef?.

Feb. 15, 1944. l.. L. GREEN' PiJMP Y Filed May 22, 1941 Y I. W77 I ATTORNEY the invention, as hereinafter pointed neuneu Fes. 1s, 1944 UNITED STATES- PATENT oFFlcE Lionel L. Green, Kansas City, Mo. Application May 22, 1941, Serial No. 394,608 2 claims. (ci. 10s-97) This invention relates to a centrifugal pump for uid pressure mechanism fortransmitting power of a prime mover to a driven member, and has for its principal object to provide a mechanism of this character which circulates the uid pressure medium only in quantity necessary to provide desired speeds of the driven member.

Another object of the invention is toprovide invention and includes a pump assembly 4 actuated by the power shaft 5 of the prime mover a, uid pressure transmitting mechanism capable y that is of simple, inexpensive construction and arranged to eiect displacement of only the fluid necessary to maintain the desired speed of the driven member; and to provide a fluid pressure transmitting mechanism arranged to circulate the pressure uid with a minimum loss of power duetofriction ofthe uid. v

In accomplishing these and other objects of out, I have provided improved details of structure, the' preferred form of which is illustrated in the accompanying drawings, wherein:

Fig. l is a diagrammatic sectional view of a huid pressure transmittingmechanism embodying the features of the present invention.

Fig. 2 is a cross-section through the pump. element on the line 2-2 of Fig. 1.

Fig. 3 is a cross-section through the motor element for actuating the driven member, taken on the line 3 3 of Fig. 1.

Fig. i is a cross-section through the pump element on the line d-d of Figui.

Fig. 5 is a detail perspective view of the assembly including the rotor and cage for controlling the edective area of the rotor blades.

Fig. d is a detail perspective viewr of the parts of the rotor shown in disassembled spaced relation.

Referring more inv detail to the drawings:

i designates a prime mover such asan internal combustion engine of a motor vehicle and which is operatively connected through a iiuid pressure transmitting mechanism 2 with a driven shaft, indicated at t, which may be the drive shaft of e; motor vehicle. The :duid pressure transmitting mechanism embodies thefeatures of the present l for circulating liquid under pressure to a motor unit 6, having connection with the drive shaft 3,

the fluid being passed through a reversing valve 1.

The pump assembly 4 includes a casing 8 having an annular wall 9 closed at one side by an end plate I0 and at the opposite side by a cover plate Il secured to a laterally extending ange l2 on the annular wall 9 by fastening devices, such as cap-screws i3. The wall 9 includes a cylindrical portion I4 and anroiset portionl5 that is eccentric of the cylindrical portion and forms a rotor chamber I6. The end plate I0 has a hub portion I1 through which the power shaft 5 extends for mounting a. rotor i 8. 'I'he rotor I8 includes a' disk-like body I9, having a hub 20 secured to the shaft 5 by means of a spline 2|, the disk being located substantially in the plane of the oilset in the outer wall 9 and of: slightly smaller diameter than the inner diameter of the cylindrical portion i4. Extending laterally from the disklike body of the rotor, and spaced from the hub thereof, is a plurality of vanes or paddles 22 having outer edges 23 projectingbeyond the periphery of the disk-like body and contacting the inner face of the cylindrical wall portion I4. The blades extend across the rotor chamber and the radial edges 24 are in sealing contact with the l inner face of the plate Il, as shown in Fig. 1, so that the enlarged offset portion forms the space in which the blades are planetated to effect centrifugal displacement of the liquid 25 into an annular passageway 26 which gradually increases in capacity-in the direction of rotation of the rotor to discharge through an outlet 2l to which is connected a duct 28. Liquid is admitted to the rotor chamber substantially concentric with the shaft 5 through a duct 29, having connection with a collar 30 formed as a part of theplate li and which provides an intake chamber 3i in order to control the eii'ective displacement incidental to actuation of the rotor, the rotor is provided with a cage 32 having a disk-like end di provided with a hub 34 slidably mounted on the shaft and which'has an annular groove 35 mounting a collar 3@ having trunnions 3l extending diametrically therefrom The trunnions t8 are engaged with the yoke-shaped ends 39 and dll of a shipper lever di which is mounted on a shaft d2 Jo'urnalled on the casing and adapted to be actuated by a lever 43 iixed to a projecting end thereof so that the cage may be reciprocated to and from telescoping vrelation with the rotor blades as later described.

which is provided with slots 45 to accommodate the outer portions 23 of the rotor blades 22. The

annular wall M is of such width that when the disk portion of the cage is in close relation to the disk-like body I9 of the rotor, the annular edge 41 thereof 'will be spaced from the radial edges of the blades a distance to accommodate a cover plate I8 having lateral slots 49 registering with the slots 45 and through which the blades may be projected. The plate 48 is attached to the other elements of the cage by fastening devices, such as screws 50, extending through suitable openings in the plate and into threaded sockets in the wall `44. The center of the plate is provided with an opening I for passing the hub of the rotor which serves as a guide in cooperation with the hub 34 in maintaining coaxial relationship of the rotor and cage.

With the construction thus far described, it is obvious that when the cage is moved to the right as shown in Fig. l, until the radial edges f the blades register with the exterior side of the plate, no part of the blades is eective in displacing the iiuid since the liquid contained within the cage is rotated with the rotor and there is no outlet therefor, the slots in the cage being occupied by the blades. However, if the cage is moved to the left, Fig. l, the radial edges of the blades are gradually exposed so that they are effective in displacing the liquid into the passageway 26 under sufficient pressure to eiect movement through the duct 28 while the displacedv liquid is being replaced with liquid supplied through the vduct 29. As the cage is moved further in the direction of the motor, a greater area of the bladessis rendered effective to increase the quantity of the displaced liquid and consequently the velocity and pressure at which the liquid is moved through the duct 28.

The reversing valve l may be of any conventional construction but is shown as including a cylindrical housing 52, having a rotating core 53 provided with passageways 5d and 55 adapted to connect the duct 28 with a laterally arranged outlet duct 5G or 51 located on opposite diametrical sides of the-valve midway between the connections for the ducts 28 and 29, as shown in Fig. 1, and to connect the duct 29 with the duct 56 or 51 so that the liquid under pressure may be directed from the duct 28 to the duct 56 and returned to the pump unit through the duct Si,

passage 55, and duct 29, or the liquid may be discharged under pressure from the duct 2d to the duct 51 and returned by way of. the ducts 56 and 29, depending upon the position of the valve lcore 53.

The motor 6 is shown as including a cylindrical plates 10 arranged in interfltting relation, as shown in Fig. 1, and secured to the disks by welding or the like. the disks being fixed to the shaft 3 so that when the liquid is admitted through the port 54 into impacting relation with the blades, the rotor rotates in a clockwise direction and the liquid discharged through the port 65 for return to the pump, or when the reversing valve is adjusted so that the liquid is admitted under pressure through the port I5 and returned through the port Il, the rotor moves in a counter-clockwise direction, Fig. 1, and at a speed depending upon the amount of liquid circulated by the pump which, of course, is governed by the effective area of the portion of the blades projecting from the cage.

In order to cool the liquid and prevent accumulation of heat, the ducts are preferably provided with radiating ns 1I, as shown in Fig. 1.

casing 58 having an annular wall 59 closed at one side by a disk-like wall 60, having a hub 6i. The opposite side is closed by a removable cover plate 62 having a hub 63 cooperating with the hub 6I to journal the drive shaft 3, previously mentioned. The wall 59 has ports 6d and B5 oset from a plane passing through the axis of the casing to connect 'with' the ducts 56 and 5l. Rotatable in the casing is a rotor S8 including spaced disks B1 and 68 interconnected by'blades so. 'rh blades es preferably include v-shaped From the foregoing it is obvious that I have provided a fluid transmission mechanism wherein the speed of the driven member is readily controlled by the amount of liquid displaced by the pump and that the amount of liquid may be readily controlled through adjustment of the cage which varies the effective area of the blades, thereby avoiding heating of the liquid as when the pump capacity is a fixed constant and the speed of the motor is controlled by throttling flow of the liquid.

What I claim and desire to secure by Letters Patent is:

1. In an apparatus of the character described, a housing having a cylindrical chamber and a pressure chamber concentric therewith,.a driving shaft concentrically supported in the cylindrical chamber and extending into the pressure chamber, a rotor on the projecting end of the driving shaft, propeller blades on said rotor projecting into the pressure chamber, a cage for said rotor including a disk having radial slots to accommodate said blades and having sliding support relative to the driving shaft, an annular flange connectedwith the periphery of the disk and having slidable support in the cylindrical chamber, said flange having slots to accommodate outer edges of the blades and means for shifting the cage longitudinally of the shaft to vary the effective portion of the blades within the pressure chamber.

2. In an apparatus of the character described, a housing having a cylindrical chamber and a pressure chamber concentric therewith, a driving shaft concentrically supported in the cylindrical chamber and extending into the pressure chamber,' a rotor disk on the projecting end of the shaft, propeller blades on said rotor disk Drojecting into the pressure chamber, a cage including disks on the respective sides of the rotor disk, and having sliding rotatable support relative to the shaft, an annular flange connecting said last vnamed disk and having sliding support within 

